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Finding the Fourth Proportional to 555,791.19, 766,890.86 and 310,780.37

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Solution

The fourth proportional to 555,791.19, 766,890.86 and 310,780.37 is: 428,820.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,791.19 : 766,890.86 = 310,780.37 : x
  2. Step 2: Convert to fraction form
    555,791.19/766,890.86 = 310,780.37/x
  3. Step 3: Cross multiply
    555,791.19x = 766,890.86 × 310,780.37
  4. Step 4: Simplify right side
    555,791.19x = 238,334,619,832.06
  5. Step 5: Solve for x
    x = 238,334,619,832.06/555,791.19
  6. Step 6: Final answer
    x = 428,820.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.